[Python-bugs-list] [ python-Bugs-594255 ] email mishandles some multiparts

[noreply@sourceforge.net]

Bugs item #594255, was opened at 2002-08-12 17:13
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=594255&group_id=5470

Category: Python Library
Group: None
>Status: Closed
>Resolution: Out of Date
Priority: 5
Submitted By: Tim Roberts (timroberts)
Assigned to: Nobody/Anonymous (nobody)
Summary: email mishandles some multiparts

Initial Comment:
Python 2.2 on Windows 2000; also occurs in Python 2.1.

email.Message.Message.is_multipart() returns true if 
and only if _payload is a list.  _payload becomes a list 
only if more than one subpart is added.  However, by 
RFC 1521, a multipart message is allowed to contain a 
single subpart.  (I received one today!)  In that case, 
Message.is_multipart() returns false, and Message.walk 
fails to enumerate the subpart.  There seems to be no 
way to discover that a parsable payload exists.

Suggested and tested fix is to modify the start of 
Message.add_payload from this:

        if self._payload is None:
            self._payload = payload

to this:

        if self._payload is None:
            if self.get_main_type() == 'multipart':
                self._payload = [payload]
            else:
                self._payload = payload


----------------------------------------------------------------------

>Comment By: Barry A. Warsaw (bwarsaw)
Date: 2002-08-12 19:42

Message:
Logged In: YES 
user_id=12800

This is fixed in Python 2.3cvs.  It's also fixed in the
standalone mimelib project, in email package version 2.2. 
It will be back ported to Python 2.2.2 at some point before
that release is made.

I suggest picking up the mimelib version and using that. 
It'll work with Python 2.1 and beyond.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=594255&group_id=5470